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Dogbane Beetle (Chrysochus auratus Fab.) as a Biological Control Agent of Spreading Dogbane (Apocynum androsaemifolium L.)

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dc.contributor.author MacEachern, Megan C.
dc.date.accessioned 2012-10-30T12:43:52Z
dc.date.available 2012-10-30T12:43:52Z
dc.date.issued 2012-10-30
dc.identifier.uri http://hdl.handle.net/10222/15666
dc.description A unique project exploring biological control of a native plant species using a native insect species en_US
dc.description.abstract Dogbane beetle, Chrysochus auratus, was studied for its biological control potential against spreading dogbane, Apocynum androsaemifolium, a native perennial weed in lowbush blueberry (Vaccinium angustifolium). No-choice host range experiments were conducted with common milkweed (Asclepias syriaca), periwinkle (Vinca minor), wild raisin (Viburnum cassenoides), and lowbush blueberry. There was no significant feeding on these plant species by adult dogbane beetles. Significant decreases in foliar dry weight were achieved with 16 beetles per ramet. In Nova Scotia, beetles were present in the field for 8-12 weeks beginning in late June or early July (225-335 growing degree days). Peak beetle abundance occured at 357-577 growing degree days and varied from 4-7 beetles/m2. The fecundity and fertility, timing of pupation, and number of instars were also examined. Females deposited approximately 100 eggs over a 20 day period, with an egg viability of over 90%. Pupae were found on June 1st and June 15th. en_US
dc.language.iso en en_US
dc.subject Chrysochus auratus, dogbane beetle, spreading dogbane, Apocynum androsaemifolium, lowbush blueberry, augmentation biological control en_US
dc.title Dogbane Beetle (Chrysochus auratus Fab.) as a Biological Control Agent of Spreading Dogbane (Apocynum androsaemifolium L.) en_US
dc.date.defence 2012-10-04
dc.contributor.department Nova Scotia Agricultural College en_US
dc.contributor.degree Master of Science en_US
dc.contributor.external-examiner Dr. David McCorquodale en_US
dc.contributor.graduate-coordinator Dr. Dian Patterson en_US
dc.contributor.thesis-reader Dr. Kris Pruski en_US
dc.contributor.thesis-supervisor Dr. Nathan Boyd, Dr. Chris Cutler en_US
dc.contributor.ethics-approval Not Applicable en_US
dc.contributor.manuscripts Not Applicable en_US
dc.contributor.copyright-release Not Applicable en_US


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